The difference between my first and second model.

I know my second model still needs a lot of work and it isn’t perfect, but I’m honestly proud of how much I’ve improved since the first one. I built the second model using the solid-and-void technique, though I feel like the balance between the two could be better. Any tips on improving that would be appreciated. For my next assignment I’ll have to add stairs, so if you have ideas or suggestions for that, I’d love to hear them too.